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Find the lowest temperature of vaporization and the highest temperature when there is liquid left over.

A liquid mixture of 20 mol% benzene, 50 mol% toluene and 30 mol% xylene is to be partially vaporized at 1 atm pressure. You are asked to find out the range of temperatures which could be used for this process.

 

 

Antoine constants:  pressure [=] mmHg Temperature [=] C

at 1 atm (degreesC)

 

A

B

C

 

Benzene

6.89

1203

220

80.1

Toluene

6.96

1347

220

110.6

Xylene

7.00

1467

214

140

1. What is the lowest temperature at which vaporization could occur? ___________ Degrees C.
(provide answer to within +/- 5 °C)

2. What is the highest temperature that could be used and liquid still be present? __________ Degrees C.
(provide answer to within +/- 5 °C)

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